Today's Message Index:
----------------------
1. 06:58 AM - Re: AeroElectric-List Digest: 1 Msgs - 08/25/23 (GLEN MATEJCEK)
2. 08:25 AM - Re: Re: Heated Seats (Charlie England)
3. 09:10 AM - Re: Electroair RPM Flux (speedy11@aol.com)
4. 09:24 AM - Feature Request for Over-voltage Module (Jeff Luckey)
5. 09:53 AM - Re: Re: Heated Seats (Matthew S. Whiting)
6. 02:46 PM - Re: Re: Heated Seats (Bill Allen)
7. 03:34 PM - Re: Re: Heated Seats (Matthew S. Whiting)
8. 03:34 PM - Re: Re: Heated Seats (Matthew S. Whiting)
9. 05:26 PM - Re: Re: Heated Seats (Charlie England)
Message 1
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| Subject: | Re: AeroElectric-List Digest: 1 Msgs - 08/25/23 |
>
> Hello Stan-
>
> Just tossing a dart here, but there's a harmonic within those numbers.
> Assuming there's no problem in the factory electronics or guidance from the
> factory, I'd start by verifying the relationship between the pickup and the
> cogs. My next step would be to check the functionalith of the sensor
> itself.
FWIW-
Message 2
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| Subject: | Re: RE: Heated Seats |
Obviously fire in flight is no joke. But one anecdote, with no further
info about brand, installation, etc shouldn't cause cardiac arrest.
There are anecdotes about battery fires, too, but we still use them. I'd
wager that carbon monoxide poisoning is a lot more common than seat
heater fires, but most people seem to be comfortable with using exhaust
heat muffs for heat.
Just trying to bring some perspective...
Charlie
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Message 3
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| Subject: | Re: Electroair RPM Flux |
Disregard that posting.=C2- Further investigation discovered the new eng
ine instruments display is a fault!
Stan
Subject: AeroElectric-List: Electroair RPM Flux
My neighbor bought a Lancair Legacy with a Lycoming TIO-540 and Electroair
Ignition system.=C2- The electrical is 28V.=C2- With the Electroair sy
stem, there is a magnetic sensor aft of the flywheel that senses passing "c
ogs" on the prop extension so as to measure and display RPM in the cockpit.
=C2- The RPM indication is accurate at idle, but with an almost impercept
ible=C2-throttle movement the RPM indication jumps from 900 to 2300 and t
hen with slightly more throttle movement it returns to a normal indication
of about 1200.=C2- All RPMs above that point are normal.=C2- So, the on
ly problem area is slightly above idle where the RPM makes erratic jumps.
=C2-=C2-1. Has anyone encountered this situation before?=C2- (Note: t
he manufacturer said it is the first time they have heard of such indicatio
ns and have no clue what might cause it)2. Any ideas on what might be causi
ng the RPM flux?
Thanks,
Stan Sutterfield
Message 4
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| Subject: | Feature Request for Over-voltage Module |
How about a feature that gives an indication that the OVM has activated?=C2
- Other than a tripped field breaker?=C2- Perhaps an idiot light?
A field breaker could trip for a few reasons:1. Regulator failure2. Regulat
or feed wire gets into trouble3. OVM crowbar event
It would be nice to know that the field breaker has tripped because of an o
ver-voltage event.
-Jeff
Message 5
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| Subject: | Re: RE: Heated Seats |
I agree we have to look at the statistics, but I also look at physics and how I
would rather not die. Wires that get flexed a lot tend to fail over time. Seat
heaters tend to get flexed a lot. Physics and material science isnt on your
side with seat heaters. And, I personally find their utility small. I have
them in my pickup and never use them. I have them on my motorcycle and almost
never use them. For me, they add risk with virtually no reward.
I also agree with battery fires. A lead acid battery is nearly immune to catching
fire. Not so with lithium chemistry. I dont have any lithium battery in
the cabin that I cant throw out an open window. And I am even mounting my lead
acid batteries forward of the firewall in my S-21 to be doubly safe.
I agree with CO poisoning which is why I am installing a sensor in my airplane
that interfaces to the G3X. And I will be using heated water from my 915iS for
cabin heat. Lastly, if I have to die, Id much, much rather die from CO poisoning,
hypoxia or hypothermia than from burning to death. Just my personal preference.
Matt
Sent from my iPad
> On Aug 26, 2023, at 11:27 AM, Charlie England <ceengland7@gmail.com> wrote:
>
>
> Obviously fire in flight is no joke. But one anecdote, with no further info about
brand, installation, etc shouldn't cause cardiac arrest. There are anecdotes
about battery fires, too, but we still use them. I'd wager that carbon monoxide
poisoning is a lot more common than seat heater fires, but most people seem
to be comfortable with using exhaust heat muffs for heat.
>
> Just trying to bring some perspective...
>
> Charlie
>
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>
>
>
Message 6
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| Subject: | Re: RE: Heated Seats |
I fitted a seat heater in my canard pusher (engine heat is far away) and it
is fed by a separate fused feed from the main bus, via a two position
=9CHi-Low-Off=9D switch.
I have an on board heuristic temperature feedback loop via the P1 glutimus
maximus. If overtemping is detected there are two ways to disable power
should the CB not do this first should a fault arise.
As another anecdotal datapoint, I ran a Toyota and Mercedes Dealership for
20 years and never saw a seat heater cause a fire.
On the list of possible failure modes that can have dire consequences, fire
is right up there with structural failure, but I dont accept a seat heater
is of the same magnitude if installed in accordance with accepted practices
.
Bill Allen
On Thu, 24 Aug 2023 at 20:32, GLEN MATEJCEK <fly4grins@gmail.com> wrote:
> Hi Jeff-
>
>
> Years ago I was planning on seat heaters, when someone on the list
> commented on how he had them in his car. I think it was a Volvo, but I'm
> not positive at this late date. In any case, while using the heater one
> day an issue arose. Within something like a minute and a half of having
> pulled over, his car was fully afire.
> I changed my focus to improving the efficiency of my cockpit heat deliver
y
> and ventilation, as well as making a really tight canopy skirt.
> FWIW-
>
--
Sent from Gmail Mobile
Message 7
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| Subject: | Re: RE: Heated Seats |
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| Subject: | Re: RE: Heated Seats |
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| Subject: | Re: RE: Heated Seats |
Given that the better seat heaters these days use carbon fiber strips
(not wire) for heating elements, it would certainly seem that the
biggest risk is in the wiring installation & controller.
On 8/26/2023 4:45 PM, Bill Allen wrote:
> I fitted a seat heater in my canard pusher (engine heat is far away)
> and it is fed by a separate fused feed from the main bus, via a two
> position Hi-Low-Off switch.
> I have an on board heuristic temperature feedback loop via the P1
> glutimus maximus. If overtemping is detected there are two ways to
> disable power should the CB not do this first should a fault arise.
>
> As another anecdotal datapoint, I ran a Toyota and Mercedes Dealership
> for 20 years and never saw a seat heater cause a fire.
>
> On the list of possible failure modes that can have dire consequences,
> fire is right up there with structural failure, but I dont accept a
> seat heater is of the same magnitude if installed in accordance with
> accepted practices.
>
> Bill Allen
>
> On Thu, 24 Aug 2023 at 20:32, GLEN MATEJCEK <fly4grins@gmail.com> wrote:
>
> Hi Jeff-
>
>
> Years ago I was planning on seat heaters, when someone on the list
> commented on how he had them in his car. I think it was a Volvo,
> but I'm not positive at this late date. In any case, while using
> the heater one day an issue arose. Within something like a minute
> and a half of having pulled over, his car was fully afire.
> I changed my focus to improving the efficiency of my cockpit heat
> delivery and ventilation, as well as making a really tight canopy
> skirt.
> FWIW-
>
> --
> Sent from Gmail Mobile
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